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APPENDIX A
Intel Express 100BASE-T4 Stackable Hub
Media Cable Connector Coding
specification type(s) type(s) scheme
100BASE-T4 CAT 3, 4, 5 UTP RJ-45 8B/6T
(4-pair wire)
100BASE-TX CAT 5 UTP RJ-45 4B/5B
(2-pair wire)
100BASE-FX 62.5/125 micron SC 4B/5B
fiber optic cable
(2 multi-mode fibers)
Basic Rules
When deploying 100BASE-T4 Fast Ethernet, you should follow three
basic rules:
• UTP cable length from repeater to workstation or switch can’t
exceed 100 meters (328 feet).
• Fiber cable length from repeater to workstation or switch can’t
exceed 131 meters (429 feet) .
• You can’t use UTP cabling to connect Express Stackable Hubs to
each other. Express Stackable Hubs are Class I repeaters and can
be connected only with Intel Cascade Cables.
Distance limitations
100BASE-T4 and 100BASE-TX
The EIA/TIA 568 wiring standard specifies that UTP wiring must not
exceed 100 meters (328 feet) from repeater to workstation or switch.
This specification limits collision domain diameter to 200 meters (656
meters).
100BASE-T4 and 100BASE-FX
In a 100BASE-T4/100BASE-FX environment, the collision domain
must not exceed 231 meters (757 feet)—100 meters T4 and 131
meters FX—in diameter.